Challenges in video based object detection in maritime scenario using computer vision

This paper discusses the technical challenges in maritime image processing and machine vision problems for video streams generated by cameras. Even well documented problems of horizon detection and registration of frames in a video are very challenging in maritime scenarios. More advanced problems of background subtraction and object detection in video streams are very challenging. Challenges arising from the dynamic nature of the background, unavailability of static cues, presence of small objects at distant backgrounds, illumination effects, all contribute to the challenges as discussed here

Complexation of Cu(II), Co(II) & Ni(II) with Hexamethylenetetramine: A Polarographic Study

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Visualisation of an entangled channel spin-1 system

Co-variance matrix formalism gives powerful entanglement criteria for continuous as well as finite dimensional systems. We use this formalism to study a mixed channel spin-1 system which is well known in nuclear reactions. A spin-j state can be visualized as being made up of 2j spinors which are represented by a constellation of 2j points on a Bloch sphere using Majorana construction. We extend this formalism to visualize an entangled mixed spin-1 system.Comment: 4 pages,4 figure

Renewable energy based electricity generation in the pacific island countries

The Pacific Island Countries (PICs) face many challenges as their small population dispersed over millions of kilometers, advances toward sustainable development. Electricity generation using renewable resources and increased access are crucial for economic and social progress. This article provides a report on the electricity generation status of various PICs and describes the steps being undertaken to ensure all the Pacific islanders have access to sustainable energy

New Grounded and Floating Simulated Inductance Circuits using Current Differencing Transconductance Amplifiers

Current differencing transconductance amplifier (CDTA) is receiving considerable attention as a building block for current-mode (CM) analog signal processing / signal generation. In this paper, new CDTA based lossless grounded and floating inductance simulation circuits have been proposed. The proposed grounded simulated inductance circuit employs two CDTAs and a single grounded capacitor whereas the floating simulated inductance circuit employs three CDTAs and a grounded capacitor. The circuit for grounded inductance does not require any realization conditions whereas in case of floating inductance only equality of two transconductances is needed (which can be easily maintained in practice by ensuring equal dc bias currents in the two transconductance amplifiers). Some sample results demonstrating the applications of the new simulated inductors using CMOS CDTAs have been given to confirm the workability of the new circuits

Effect of interaction and mobility on fixed-bed reactor performance

The roles of interaction and mobility in determining surface rates and hence reactor performance, as reflected in the space time values required for achieving a desired conversion or selectivity, are demonstrated. It is shown that localized adsorption models predict larger space times in comparison to the mobile models. Further, repulsive forces lead to higher space times in comparison to attractive forces, and the divergence between models is most marked for localized adsorption

Association and correlation of thyroid dysfunction with anemia types in pregnant women of northern Andhra Pradesh, India

Background: Thyroid dysfunction is a common disorder in pregnancy along with anemia. But no study has evaluated the association between them. To estimate the prevalence of thyroid dysfunction and its association with anemia types in pregnant women during 1st trimester.Methods: Three hundred and eighty pregnant women with <12 weeks of gestational age were selected for the study with no history of thyroid dysfunction and anemia. All the pregnant women were classified into A, euthyroid and B, thyroid dysfunction groups. The B group was again subdivided into hypothyroid, subclinical hypothyroid (SCH), hyperthyroid according to nature of dysfunction. 5 ml of blood sample was collected from all subjects to analyse thyroid hormones and erythrocyte indices.Results: Out of 380 subjects, euthyroid was found to be 77.9%, and rest 22.1% were with thyroid dysfunction. Out of 84 thyroid dysfunction, hypothyroid was found to be 7.9%, SCH 13.9% and hyperthyroid was 0.3%. Out of 296 euthyroid women, anemia was identified in 97 pregnant women (32.8%) whereas in thyroid dysfunction women it was 43 women out of 84 (51.2%) which is a statistically significant. Significantly higher frequency of microcytic hypochromic anemia and normocytic normochromic anemia types were also found in thyroid dysfunction groups compared to euthyroid group (p<0.05). However, no significance between the thyroid dysfunction groups, Statistically significant difference was observed in the Hb concentration, RBC count, MCV, MCH and PCV between euthyroid and different thyroid dysfunction conditions (p<0.05). A statistically significant positive correlation was found between fT4 and erythrocyte indices.Conclusions: As fT4 and TSH correlated with erythrocyte indices, it is advisable to screen for thyroid dysfunction and vice versa so as to prevent the complications associated with anemia and thyroid dysfunction

Novel Organotin(IV)-Schiff Base Complexes: Synthesis, Characterization, Antimicrobial Activity, and DNA Interaction Studies

Four organotin(IV) complexes with 2-(2-hydroxybenzylideneamino)isoindoline-1,3-dione (L1), and 4-(4-hydroxy-3-methoxybenzylideneamino-N-(pyrimidin-2-yl)benzenesulfonamide (L2) were synthesized and well characterized by analytical and spectral studies. The synthesized compounds were tested for antimicrobial activity by disc diffusion method. The DNA binding of the complexes 1 and 3 with CT-DNA has been performed with absorption spectroscopy, which showed that both the complexes are avid binders of CT-DNA. Also the nuclease activity of complexes 1 and 3 with plasmid DNA (pUC19) was studied using agarose gel electrophoresis. The complex 1 can act as effective DNA cleaving agent when compared to complex 3 resulting in the nicked form of DNA under physiological conditions. The gel was run both in the absence and presence of the oxidizing agent